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.\" ========================================================================
.\"
.IX Title "Carton::Doc::Update 3pm"
.TH Carton::Doc::Update 3pm "2022-05-12" "perl v5.34.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Carton::Doc::Update \- Update the dependencies
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  carton update [module]
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Update the dependencies version for your application.
.PP
Carton is designed to update your dependency in a conservative way,
meaning that it doesn't update modules that aren't explicitly required
to.
.PP
\&\f(CW\*(C`carton update\*(C'\fR is a command to explicitly update one or all of
modules in your cpanfile to the latest available that satisfies the
requirements in cpanfile.
.SH "EXAMPLE"
.IX Header "EXAMPLE"
Suppose you have a cpanfile with:
.PP
.Vb 2
\&    requires \*(AqDBI\*(Aq, \*(Aq1.600\*(Aq;
\&    requires \*(AqPlack\*(Aq, \*(Aq== 1.0011\*(Aq;
.Ve
.PP
and then run \f(CW\*(C`carton install\*(C'\fR to get \s-1DBI 1.610\s0 (the latest at that
time) and Plack 1.0011 (as specified in the requirement).
.PP
A few weeks later, \s-1DBI\s0 and Plack have been updated a couple of
times. Running \f(CW\*(C`carton install\*(C'\fR \fIwon't\fR update the versions, because
the installed versions satisfy the requirements in \f(CW\*(C`cpanfile\*(C'\fR.
.PP
Running \f(CW\*(C`carton update\*(C'\fR will update \s-1DBI\s0 to the latest version, say
1.611, because the version still satisfies the requirement. However,
it won't update Plack's version, since whatever latest version on \s-1CPAN\s0
will not satisfy the Plack's requirement \f(CW\*(C`== 1.0011\*(C'\fR because it wants
an exact version.